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107 changes: 107 additions & 0 deletions
107
manager/src/main/kotlin/me/rhunk/snapenhance/manager/lspatch/LSPatchObfuscation.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,107 @@ | ||
| package me.rhunk.snapenhance.manager.lspatch | ||
|
|
||
| import org.jf.dexlib2.Opcodes | ||
| import org.jf.dexlib2.dexbacked.DexBackedDexFile | ||
| import org.jf.dexlib2.iface.reference.StringReference | ||
| import org.jf.dexlib2.writer.io.FileDataStore | ||
| import org.jf.dexlib2.writer.pool.DexPool | ||
| import org.jf.dexlib2.writer.pool.StringPool | ||
| import java.io.BufferedInputStream | ||
| import java.io.File | ||
| import java.io.InputStream | ||
|
|
||
| data class DexObfuscationConfig( | ||
| val packageName: String, | ||
| val metadataManifestField: String? = null, | ||
| val metaLoaderFilePath: String? = null, | ||
| val configFilePath: String? = null, | ||
| val loaderFilePath: String? = null, | ||
| val originApkPath: String? = null, | ||
| val cachedOriginApkPath: String? = null, | ||
| val openAtApkPath: String? = null, | ||
| val assetModuleFolderPath: String? = null, | ||
| val libNativeFilePath: Map<String, String> = mapOf(), | ||
| ) | ||
|
|
||
| class LSPatchObfuscation( | ||
| private val cacheFolder: File, | ||
| private val printLog: (String) -> Unit = { println(it) } | ||
| ) { | ||
| private fun obfuscateDexFile(dexStrings: Map<String, String?>, inputStream: InputStream): File { | ||
| val dexFile = DexBackedDexFile.fromInputStream(Opcodes.forApi(29), BufferedInputStream(inputStream)) | ||
|
|
||
| val dexPool = object: DexPool(dexFile.opcodes) { | ||
| override fun getSectionProvider(): SectionProvider { | ||
| val dexPool = this | ||
| return object: DexPoolSectionProvider() { | ||
| override fun getStringSection() = object: StringPool(dexPool) { | ||
| private val cacheMap = mutableMapOf<String, String>() | ||
|
|
||
| override fun intern(string: CharSequence) { | ||
| dexStrings[string.toString()]?.let { | ||
| cacheMap[string.toString()] = it | ||
| printLog("mapping $string to $it") | ||
| super.intern(it) | ||
| return | ||
| } | ||
| super.intern(string) | ||
| } | ||
|
|
||
| override fun getItemIndex(key: CharSequence): Int { | ||
| return cacheMap[key.toString()]?.let { | ||
| internedItems[it] | ||
| } ?: super.getItemIndex(key) | ||
| } | ||
|
|
||
| override fun getItemIndex(key: StringReference): Int { | ||
| return cacheMap[key.toString()]?.let { | ||
| internedItems[it] | ||
| } ?: super.getItemIndex(key) | ||
| } | ||
| } | ||
| } | ||
| } | ||
| } | ||
| dexFile.classes.forEach { dexBackedClassDef -> | ||
| dexPool.internClass(dexBackedClassDef) | ||
| } | ||
| val outputFile = File.createTempFile("obf", ".dex", cacheFolder) | ||
| dexPool.writeTo(FileDataStore(outputFile)) | ||
| return outputFile | ||
| } | ||
|
|
||
|
|
||
| fun obfuscateMetaLoader(inputStream: InputStream, config: DexObfuscationConfig): File { | ||
| return obfuscateDexFile(mapOf( | ||
| "assets/lspatch/config.json" to "assets/${config.configFilePath}", | ||
| "assets/lspatch/loader.dex" to "assets/${config.loaderFilePath}", | ||
| ) + (config.libNativeFilePath.takeIf { it.isNotEmpty() }?.let { | ||
| mapOf( | ||
| "!/assets/lspatch/so/" to "!/assets/", | ||
| "assets/lspatch/so/" to "assets/", | ||
| "/liblspatch.so" to "", | ||
| "arm64-v8a" to config.libNativeFilePath["arm64-v8a"], | ||
| "armeabi-v7a" to config.libNativeFilePath["armeabi-v7a"], | ||
| "x86" to config.libNativeFilePath["x86"], | ||
| "x86_64" to config.libNativeFilePath["x86_64"], | ||
| ) | ||
| } ?: mapOf()), inputStream) | ||
| } | ||
|
|
||
| fun obfuscateLoader(inputStream: InputStream, config: DexObfuscationConfig): File { | ||
| return obfuscateDexFile(mapOf( | ||
| "assets/lspatch/config.json" to config.configFilePath?.let { "assets/$it" }, | ||
| "assets/lspatch/loader.dex" to config.loaderFilePath?.let { "assets/$it" }, | ||
| "assets/lspatch/metaloader.dex" to config.metaLoaderFilePath?.let { "assets/$it" }, | ||
| "assets/lspatch/origin.apk" to config.originApkPath?.let { "assets/$it" }, | ||
| "/lspatch/origin/" to config.cachedOriginApkPath?.let { "/$it/" }, // context.getCacheDir() + ==> "/lspatch/origin/" <== + sourceFile.getEntry(ORIGINAL_APK_ASSET_PATH).getCrc() + ".apk"; | ||
| "/lspatch/" to config.cachedOriginApkPath?.let { "/$it/" }, // context.getCacheDir() + "/lspatch/" + packageName + "/" | ||
| "cache/lspatch/origin/" to config.cachedOriginApkPath?.let { "cache/$it" }, //LSPApplication => Path originPath = Paths.get(appInfo.dataDir, "cache/lspatch/origin/"); | ||
| "assets/lspatch/modules/" to config.assetModuleFolderPath?.let { "assets/$it/" }, // Constants.java => EMBEDDED_MODULES_ASSET_PATH | ||
| "lspatch/modules" to config.assetModuleFolderPath, // LocalApplicationService.java => context.getAssets().list("lspatch/modules"), | ||
| "lspatch/modules/" to config.assetModuleFolderPath?.let { "$it/" }, // LocalApplicationService.java => try (var is = context.getAssets().open("lspatch/modules/" + name)) { | ||
| "lspatch" to config.metadataManifestField, // SigBypass.java => "lspatch", | ||
| "org.lsposed.lspatch" to config.cachedOriginApkPath?.let { "$it/${config.packageName}/" }, // Constants.java => "org.lsposed.lspatch", (Used in LSPatchUpdater.kt) | ||
| ), inputStream) | ||
| } | ||
| } |
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